Exhaust staining.... - Discuss Exhaust staining.... on CBRXX, the ultimate on-line community for Honda motorcyclists. Read it in Australia. (Regional discussion for members that live in Australia.)

Maestro · 04-21-2008, 3:38 AM

My exhausts, just under and behind the riders pegs, are starting to get some light brown staining. Has anyone else had this problem?? Any ideas how to get rid of it??

I polish them regularly and the rest of the exhaust is spotless and like a mirror, except these spots.

Thanks.

Nutter67 · 04-21-2008, 4:09 AM

Standard (esp with cats in the headers). Stainless will change colour if it gets hot enough - straw colour means at around 200deg. Dont know how to get rid of it. It is bad enough trying to clean the melted boot sole from around the centerstand.

DragonXX · 04-21-2008, 4:58 AM

Using Autosol metal polish will get rid of it .................................................. .................. But it'll be back

Used to do it every weekend, but have given in and lived with the nickel colour (Nutter said the same thing once)

Maestro · 04-21-2008, 5:00 AM

Thanks guys. Have been using Autosol from the day I bought the bike, doesn't work though....

CanadianBird · 04-21-2008, 10:28 AM

Titanium doesn't do that.

red-oh-one · 04-21-2008, 10:43 AM

The stain is caused by heat coming through the pipe. Basically it is burning from the inside. There are lots of products, but they just polish the outside. The heat is coming through the inside, therefore no permanent cure. Maybe ceramic coating on the inside, and watching the lean mixture. (This generates more heat). Cruisers solve the problem with chrome heat shields outside the stained pipes.
I put some heat shields on the pipes when I lowered the pegs to prevent the melted boot stains on the pipes.

Banshee · 05-19-2008, 3:00 AM

Yep, that is heat colouring from the temp of the cats. "Light Straw" colour in stainless steel is about 239C. Just like the multi coloured headers you used to see on bikes with chromed header pipes where it went through the range of colours, but "only" up to 239C here. It is why I took them off & put non cat pipes on.

04-21-2008, 4:09 AM	#2
Nutter67 Administrator Join Date: Aug 31 2007 Location: Seaford, Victoria, Australia Age: 42 Posts: 5,415	Re: Exhaust staining.... Standard (esp with cats in the headers). Stainless will change colour if it gets hot enough - straw colour means at around 200deg. Dont know how to get rid of it. It is bad enough trying to clean the melted boot sole from around the centerstand. __________________ *Paul* *Never let a motorcycle take you somewhere your brain didn't get to three seconds earlier*

04-21-2008, 4:58 AM	#3
DragonXX ... Get A Good Lawyer ! Join Date: Dec 20 2007 Location: Gold Coast, Australia Age: 45 Posts: 2,722	Re: Exhaust staining.... Using Autosol metal polish will get rid of it .................................................. .................. But it'll be back Used to do it every weekend, but have given in and lived with the nickel colour (Nutter said the same thing once) __________________ " 'Birds of a feather, flock together " Quote of the month: "Make everything as simple as possible, but not simpler." - Albert Einstein

04-21-2008, 5:00 AM	#4
Maestro Join Date: Jan 05 2008 Location: Sydney, Australia Posts: 34	Re: Exhaust staining.... Thanks guys. Have been using Autosol from the day I bought the bike, doesn't work though....

04-21-2008, 10:28 AM	#5
CanadianBird Join Date: Nov 25 2006 Location: BC Canada Posts: 4,378	Re: Exhaust staining.... Titanium doesn't do that.

04-21-2008, 10:43 AM	#6
red-oh-one Join Date: Dec 04 2006 Location: Tampa,Fl. Posts: 128	Re: Exhaust staining.... The stain is caused by heat coming through the pipe. Basically it is burning from the inside. There are lots of products, but they just polish the outside. The heat is coming through the inside, therefore no permanent cure. Maybe ceramic coating on the inside, and watching the lean mixture. (This generates more heat). Cruisers solve the problem with chrome heat shields outside the stained pipes. I put some heat shields on the pipes when I lowered the pegs to prevent the melted boot stains on the pipes.

05-19-2008, 3:00 AM	#7
Banshee Join Date: Jun 21 2007 Location: Springwood, West of Hell (Sydney), Australia Age: 43 Posts: 1,071	Re: Exhaust staining.... Yep, that is heat colouring from the temp of the cats. "Light Straw" colour in stainless steel is about 239C. Just like the multi coloured headers you used to see on bikes with chromed header pipes where it went through the range of colours, but "only" up to 239C here. It is why I took them off & put non cat pipes on.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
XX exhaust system options-Need help!	XANDROS	Engine / Airbox / Exhaust / Fuel Delivery	7	12-20-2007 7:04 PM
4-2-1 Exhaust System and Hardbag Fitment.	TigreST	Riding Gear / Luggage / Electronics	0	11-02-2007 6:04 PM
exhaust tips	WAYNE	Engine / Airbox / Exhaust / Fuel Delivery	4	11-01-2007 2:11 PM
drilling stock exhaust	birdxxx	Engine / Airbox / Exhaust / Fuel Delivery	27	10-25-2007 7:25 PM
Jetting / Exhaust Question	Falcon23	Engine / Airbox / Exhaust / Fuel Delivery	8	07-25-2007 8:17 PM